Pasteurizer.



H. CHRISTBNSEN.

PASTBURIZER.

APPLICATION FILED JAN. 3, 1910.

957,035. Patented May 3, 1910.

I f y 2y UNITED sTATEs PATENT oEEIoE.

HANS CHRISTENSEN, OF FORT ATKINSON, WISCONSIN, ASSIGNOR 0F ONE-HALF TCHARLES PALM, OF FORT ATKINSON, WISCONSIN.

PASTEURIZER.

Specication of Letters Patent.

Patented May 3, 1910.

To all whom 'it may cof/wem:

Be it known that I, HANS CI-IRISTENSEN, a citizen of the United States,residing at Fort Atkinson, in the county of Jefferson and State ofWisconsin, have invented certain new and useful Improvements inPasteurizers; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledinthe art to which it appertains to make and use the same.

This invention relates to improvements in machines for pasteurizing orsterilizing liquids.

One object of the invention is to provide an improved device of thischaracter whereby the pasteurization of milk or other liquids will begreatly simplified and more thoroughly accomplished.

Another object is to provide a pasteurizer or sterilizer the parts ofwhich may be readily separated for cleaning or other purposes.

1With the foregoingand other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts as will be more fully described and particularly pointed out inthe appended claims.

In the accompanying drawings, Figure 1 is a central vertical sectionalview of a pasteurizer constructed in accordance with the invention; Fig.2 is a top plan view of the same; Fig. 3 is a similar view 0f the lowerportion of the machine with the cover removed and showing thearrangement of the heating coil therein.

In the embodiment of the invention, I provide a hollow supporting base 1having on its upper end a ball bearing 2. Arranged on the upper end ofthe base is a circular bowl or basin 3 having an inclined bottom et. Thebase 1 and bowl 3 are preferably formed of boiler iron, while thebearing 2 is formed in the upper end of a tubular cast metal bearingblock 5 secured to the upper portion of the base as shown. Secured tothe outer side of the upper portion of the bowl 3 is a circular milkreceiving trough 6 into which the sterilized or pasteurized milk isdischarged and from which said milk asses through an outlet or dischargetube to a suitable receptacle provided to receive the same. In thedischarge tube 7 vis preferably arranged a thermometer 8, whereby thetemperature if the milk passing from the trough is ascertained.

Revolubly mounted in the bearing block 5 is a tubular shaft 9 whichprojects upwardly through and above the bowl 3 and to said shaft issecured a supporting spider 10, in the center or base ortion of which isformed a ball race 11, which is engaged with a ball bearing 2 on thebearing block 5, as shown. On the arms of the spider is secured a liquidheating coil 12, which is formed from a continuous spirally coiled tube,the inner end of which is connected by a steam conducting pipe 13 withthe lower portion of the tubular shaft 9 which also serves as a steamconducting tube and which is connected at its lower end to a steam inlettube 141-, rsaid tube 111 entering the tube 9 through a packed joint orstuiiing box 15, whereby said tubular sha-ft 9 is permitted to revolveon the end of the steam inlet tube. The outer end of the coil 12 isconnected to the upper portion of the tubular shaft 9 by a steamdischarge pipe 16 which enters the shaft above the pipe 13. The shaft 9is divided between the ends of the pipes 13 and 16 by a transversepartition 17, whereby the inlet end of the shaft is separated from thedischarge end. The coils of the heating coil are spaced apart and thespaces between the coils filled by the soldering material 12, thepurpose of which will hereinafter appear.

The outer edge of the plate formed by the coil 12 is disposed adjacentto the sides of the upper portion of the bowl 3 and to the outer coil ofthe plate is secured an annular flange 1S which projects over theadjacent upper edge of the bowl 3 and serves to direct the milk or otherliquid from the coil into the trough 6. Fixedly mounted on the lowerportion of the tubular shaft 9 in the hollow base 1 is a beveled gear 19which is engaged with a similar gear 20 on a drive shaft 21 mounted insuitable bearings 22 in one side of the base as shown. On the outer endof the shaft 21 are mounted fast and loose pulleys 23 and 21, wherebythe shaft 9 and coil are rapidly revolved by any suitable powerconnected with the pulleys by a belt not shown.

Over the bowl 3 and coil 12 and removably engaged with and supported bythe outer wall of the trough 6 is a combined liquid distributing andheating cover section, comprising an annular rim 25, the lower edge ofwhich fits into the upper portion of the trough 6 upon which it issupported by means of an annular bead 26 secured to the outer side ofthe rim and engaging a similar bead 27 formed on the upper edge of thetrough as shown. In the upper portion of the rim 25 is arranged acircular steam and water chamber 28, which inclines or tapers downwardlyfrom its center toward its outer edges where it is secured to the innerside of the rim 25. The rim 25 projects above the lower edge of thechamber 28 and forms an annular flange 29, the purpose of which willhereinafter appear. Secured to the inner wall of the chamber 28 is acentrally disposed guide tube 30, which is preferably braced by anannular boss 31 and which is adapted to loosely engage the upper ordischarge end of the tubular shaft 9 as shown.

The upper end of the shaft 9 projects a slight distance above the upperend of the guide tube 3() and into the steam chamber 28 and in saidchamber above the upper open end of the shaft 9 is arranged a conicalsteam deflector 32 which deflects the steam from the upper end of theshaft in one direction through the chamber 28.

Secured to the guide tube 30above the coll 12 is a milk receiving funnel33 which 1s open at its lower end around the tube 30 and secured to saidtube immediately below the open end of the funnel is an annular radiallyprojecting downwardly curved deflecting flange 34;, upon which the milkor other liquid from the funnel is discharged and by which Asaid liquidis directed onto the heating coil. Connected with the upper end of thefunnel 33 is a milk conducting tube 35, the upper outer end of whichcommunicates with the upper side of the chamber 28 adjacent to theflange 29 whereby the milk or liquid flowing down over the upper side ofthe chamber 28 is conducted through said tube 35 to the funnel 33.Secured to the chamber 28 over the center of the same is a milkreceptacle 36, the lower edge of which is spaced a suitable distanceabove the upper side of the chamber 28 to provide a discharge passagethrough which the milk placed in the `receptacle flows out in alldirections over the inclined upper side of the steam chamber where saidmilk or other liquid is promptly heated and after which said milk passesthrough the tube 35 to the funnel 33 and from thence is directed ontothe rapidly revolving heating and aerating coil 12 on which, owing tothe centrifugal motion imparted thereto by the rapidly revolvingmovement of the coil, said milk is thrown outwardly toward the outer.

edges of the coil and spread over the latter in a thin sheet whichgradually decreases in thickness toward the outer edge of the coil, andfrom which the thin sheet of milk is nally thrown off over thedeflecting flange 18 and into the trough 6 from which it passes in apasteurized or sterilized state through the discharge tube 7. By thusspreading the milk or other liquid out into a thin sheet, the same isthoroughly heated by contact withthe steam heated coil 12 and thoroughlyaerated before being discharged into the trough 6. Connected to thesteam chamber 28 and passing through the rim 25 is a drain pipe 37having on its outer end a drain' cock 38. Also connected with the steamchamber 28 is a condensed steam or water discharge pipe 39 to which thewater of condensation is forced from the steam chamber. The pipe 39 ispreferably provided with a thermometer 40, whereby the temperature ofthe steam and water passing from the vchamber 28 may be ascertained.

Vhile the device has been herein described as being employed forsterilizing liquids by the application rof heat, it is obvious that byemploying cold water or other fluid in place of steam that the devicemay be employed and is well adapted for the purpose of rapidly coolingliquids which are passed therethrough as herein described.

From the foregoing description taken in connection with the accompanyingvdrawings, the construction and operation of the invention will bereadily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention as defined in theappended claims.

Having thus described my invention, what I claim is 1. A device of thecharacter described comprising a supporting base, a revolubly mountedcoil arranged above said base, an inclined steam chamber arranged oversaid coil, means to discharge the liquid onto said chamber, and meanswhereby the liquid is conducted from said chamber to said coil overwhich the liquid is passed in a thin sheet by the centrifugal yaction ofthe revolving coil.

2. A pasteurizer ycomprising a base, a tubular shaft revolubly mountedtherein, `a coil secured to said shaft and revolved thereby, meanswhereby steam is admitted to and passed through said coil, a steamchamber arranged above the coil, said chamber being inclined from itscenter toward its outer edges, means to conduct the steam from said coilto said chamber, a milk distributing ,receptacle arranged above saidchamber and adapted to discharge milk on the upper surface thereof, amilk conducting tube .connected'with the upper surface of said `heatingchamber, and means whereby the milk or other liquid is discharged ontothe coil from said conducting tube and is spread outwardly in a thinsheet over the coil by the centrifugal action thereof.

3. A pasteurizer comprising a hollow base, a tubular shaft revolublymounted in said base, a driving mechanism connected with said shaft, abowl arranged on the upper end of the base, a heating coil secured toand revolved by said shaft, a milk trough arranged around the upper edgeof said bowl, a milk conducting flange secured to the coil andprojecting over the adjacent edge of the trough, a steam chamberarranged above said coil and trough, said chamber being inclined fromits center to its outer edges, a liquid retaining flange around theouter edge of said chamber, a milk receptacle arranged above the centerof the chamber whereby milk is evenly distributed over the upper surfaceof the chamber, a milk conducting pipe connected with said uppersurface, and means whereby the milk from said tube is evenly distributedonto said heating coil and is thrown across the same in a thin sheet bythe centrifugal action of the coil and is discharged therefrom over saidflange and into said trough.

l. A pasteurizer comprising a base, a hollow steam conducting shaftrevolubly mounted in said base, a steam inlet pipe connected with thelower end of said shaft, means whereby the latter is driven, a bowlarranged on the upper end of said base, a heating coil connected to andrevolved by said shaft, a steam conducting pipe to connect the inner endof said coil with the lower portion of said shaft whereby steam passesfrom the shaft to the coil, a steam discharge pipe to connect the outerend of the coil with the upper portion of said shaft, a trough securedto the upper end of said bowl, an annular rim adapted to be removablyengaged with said trough, a steam chamber connected to said rim, saidchamber being inclined from its center toward its outer edges, andconnected on its under side with the upper discharge end of said tubularshaft whereby the steam discharged from said coil is conducted to saidsteam chamber, and a milk distributing receptacle arranged above theupper surface of said steam chamber.

5. A pasteurizer comprisin a base, a hollow shaft revolubly mounte insaid base, a supporting spider secured to said shaft and having a ballbearing engaging with the upper portion of said base, a splral steamcoil arranged on said spider, said coil being soldered together to forma solid plate, means whereby steam is conducted to said coil, a bowlsecured to the upper end of said base, an annular milk trough secured tothe upper' end of the bowl and adapted to receive the milk passed oversaid coil, an annular rim removably engaged with and supported by saidtrough, a steam chamber secured to said rim, said chamber being inclinedfrom its center toward its outer edges and communicating on its underside with the upper end of said tubular shaft, a steam defiectorarranged in said chamber above the upper opcn end of the shaft, a guidetube secured to the under side of said chamber and adapted to be engagedwith the upper end of the shaft, a funnel secured to sald tube, anannular deecting flange secured to the tube below the lower dischargeend of said funnel whereby the milk therefrom is directed onto saidcoil, a milk distributing receptacle arranged above the upper surface ofsaid steam chamber, a milk conducting tube to connect said upper surfaceof the chamber with said funnel, a milk retaining flange arranged aroundthe outer edge of the upper surface of said steam chamber, a drain pipeand cock, and a condensed steam discharge pipe connected with said steamchamber.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HANS CHRISTENSEN. lVitnesses E. E. HAY, GUs'rAvE Miei-Inns.

